Valve.



No. 686,098. Patented Nov. 5, l90l.

T. sxmmnm.

VALVE.

(Application ,filed Feb. 12. 19 01.) (No Model.) 2 Shanty-Sheet 2.

/N VENTOR NITED STATES PATENT OFFICE.

TIMOTHY S. MARTIN, OF BUTTE, MONTANA.

VALVE.

SPECIFICATION forming part of Letters Patent No. 686,098, dated November 5, 1901. Application filed February 12, 1901. Serial No. 47,011. (No model.)

To all whom, it may concern:

Be it known that I, TIMOTHY S. MARTIN, a citizen of the United States, and a resident of Butte, in the county of Silverhow and State of Montana, have invented a new and 11m proved Valve, of which the following is a full, clear, and exact description.

My invention relates to valves controlling several passages at the same time-as, for instance, in radiators.

The object of my invention is to provide an improved valve of this class which will be readily adjusted, which will be positive in its movement,and in which the fluid-passage will be but little obstructed.

The invention will be fully described hereinafter and the feature of novelty pointed out in the appended claims.

Reference is to be had to the accompanying drawings, in which Figure 1 is a central sectional elevation of my improved valve. Fig. 2 shows the said valve in connection with a radiator.

The casing A has two chambers A A from which project nipples A A for the reception of unions B B, connecting with pipes O O in permanent communication with the radiator R, as shown in Fig. 2. The casing, further, has chambers A A, communicating with steam-pipes D D, connected with the boiler, one pipe supplying steam, while the other is the return-pipe. Between the chambers A and A is located a valve-seat A", and between the chambers A and A is arranged a valve-seat A On these seats are adapted to rest valves E E, respectively, opening toward the radiator and having stems F F passing through heads G G and stuffing-boxes H H. Each stem is rigidly yet adjustably connected with a cross-barI-for instance, by means of nuts J engaging said cross-bar on both sides and screwing on the stems F F. It will be understood-thatthe stems pass through the cross-bar loosely and that each valve E E maybe adjusted separately, so that in case it should be necessary to regrind one of the valves or its seat the other valve may be left undisturbed. l

The casing A has, further, a central chamber A", having a valve-seat A to which lead channels A A from the chambers A A respectively. The said seat is adapted for e11- gagement by a valve E having a stem F passing through a head G2 and a stufiing-box H The stems F F simply slide in the corresponding heads G G; but the stem F screws into the head G the threaded portion being indicated at F The stem F has another screw portion F, threaded in the opposite direction and of greater pitch, said portion F in practice having a pitch double that of the portion F. This screw portion F engages the correspondinglythreaded central bore of the cross-bar I. The outer end of the stem F carries an operating-wheel F The drawings show the central valve E closed and the other valves E E open, so that steam may pass from the boiler to the radiator and back to the boiler, as indicated by the arrows. If new the wheel F is turned so as to cause the stem F to screw outward in its head G the valve It will be lifted 0d the seat A", opening a direct communication from the steam-inlet pipe D to the steam-outlet pipe D through chamber A channel A, valve-seat A chamber A, channel A, and chamber A As the stem F moves outward it carries the cross-bar I with it. If the pitch of the two opposite screw-threads F F were the same, the inward movement given to the cross-bar I by the rotating stem would exactly equal the outward movement given to it in consequence of the bodilyoutward movement of the stem, and as a result the crossbar I would remain stationary. In order to obtain an inward movement of the cross-bar and of the valves E E, connected therewith, the pitch of the screw-th read F has therefore been made greater than that of the screwthread F and preferablyjust double, so that the resulting inward movement of the valves E E will be equal in extent to the outward movement of the valve E Notwithstanding its longitudinal motion the stem F always hasasolid hearing or purchase on the thread of the head G so that the movement of the valves is positive. As before stated, each of the valves E E can be adjusted independently, thereby facilitating repairs. It will be understood that when the central valve E is opened the other valves are closed, and vice versa.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination of the casing having four ports arranged in pairs, a valve controlling the connection between the ports of one pair, another valve controlling the connection between the ports of the other pair, a connecting member for said valves,whereby they are compelled to move in unison, a third valve controlling the connection between a port of one pair and a port of the other pair, said valve having a stem screwing into a stationary part and into the said connecting member, the two screw-threads being of opposite direction and of difierent pitch.

2. The combination of the casing having four ports arranged in pairs, a valve controlling the connection between the ports of one pair, another valve controlling the connection between the ports of the other pair, a connecting member for said valves, whereby they are compelled to move in unison, a third valve controlling the connection between a port of one pair and a port of the other pair, said valve having a stem screwing into a stationary part and into the said connecting member, the two screw-threads being of opposite direction, and the screw-thread at the connecting member being about twice the pitch of the screw-thread at the stationary part.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

TIMOTHY S. MARTIN. lVitnesses:

J AMES W. FORBIS, J. A. POORE. 

